Telephone set



FIG. 1 is a top plan view of a telephone set;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof; and,

FIG. 4 is a perspective view thereof with a handset removed.

The left side and rear form no part of the claimed design. 

The ornamental design for a telephone set, as shown and described. 